61165944 has 96 divisors (see below), whose sum is σ = 190775520. Its totient is φ = 17342208.

The previous prime is 61165943. The next prime is 61165957. The reversal of 61165944 is 44956116.

61165944 is a `hidden beast` number, since 61 + 1 + 6 + 594 + 4 = 666.

61165944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61165944² = 7482545410822272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 61165899 and 61165908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61165943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78742 + ... + 79514.

It is an arithmetic number, because the mean of its divisors is an integer number (1987245).

Almost surely, 2^61165944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61165944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95387760).

61165944 is an abundant number, since it is smaller than the sum of its proper divisors (129609576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61165944 is a wasteful number, since it uses less digits than its factorization.

61165944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949 (or 942 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 61165944 is about 7820.8659367106. The cubic root of 61165944 is about 394.0063558115.

The spelling of 61165944 in words is "sixty-one million, one hundred sixty-five thousand, nine hundred forty-four".